Immersion sample cartridge

ABSTRACT

A sample mold cartridge for a molten metal sampling lance is pre-assembled prior to insertion in the hollow interior of a tubular lance used for holding the cartridge during immersion in a bath. The cartridge includes opposed mold halves defining a mold cavity and a smooth walled tube extending into the mold cavity for conveying the metal to the mold cavity. The parts are secured together by a refractory disc having an aperture which receives mold parts and a refractory insulative shield which supports the free end of the smooth walled tube. A paperboard sleeve arranged around the mold parts and the smooth walled tube and located between the disc and shield is cemented to the refractory shield and disc to rigidity the assembly.

United States Patent m1 Falk Feb. 12, 1974 IMMERSION SAMPLE CARTRIDGE v Priinary-Examiner-S. Clement Swisher [76] Inventor: Richard A. Falk, 519 Westminster Fuller Dri, Waukesha, Wis. 53186 ABSTRACT [22] 1972 A sample mold cartridge for a molten metal sampling [211 App]. No.: 277,190 lance is pre-assembled prior to insertion in the hollow interior of a tubular lance used for holding the cartridge-during immersion in a bath. The cartridge inil. 73/4254 Rag/1133.119; eludes pp mold halves defining a mold cavity 8 n I l and a smooth walled tube extending into the mold [5 1 e d Search 73/DIG 425 4 6 cavity for conveying the metal to the mold cavity. The [56] References Cited parts are secured together by a refractory disc having an aperture which receives mold parts and a refrac- UNITED STATES PATENTS tory insulative shield which supports the free end of 3,552,214 1/1971 COllll'lS 73/4254 the smooth tube A paperboard leeve arranged 3,646,816 3/l972 l-lance 73/425.4 around h mold pans and the smooth walled tube and E'; 42 5: located between the disc and shield is cemented to the 3656350 4/1972 gm z [4425 4 refractory shield and disc to rigidity the assembly.

7 Claims, 3 Drawing Figures IMMERSION SAMPLE CARTRIDGE SUMMARY OF INVENTION A sample mold cartridge for a lance includes in integrated assembly, opposed mold halves having a mold cavity and projecting tubular extensions, a smooth wall tube extending through the extensions and communicating with the mold cavity, a refractory disc or support having an aperture for receiving the extensions and a refractory shield supporting the free end of said tube. An insulative or paperboard sleeve arranged around the tubular extensions and the smooth wall tube and cemented to the support and the shield provides rigidity and protection for the tube and mold parts. The refractory shield insulates the tube and mold cavity from the bath and can be annular in form and seated against the end of a hollow tubular lance and secured to the lance with refractory cement.

Further objects, advantage and features of 'the invention will become apparent from the following disclosure.

DESCRIPTION OF DRAWINGS FIG. 1 is an elevational view in fragmentary section of a sampling lance embodying the sampler cartridge of the invention.

FIG. 2 is a sectional view along line 2--2 of FIG. 1.

FIG. 3 is a sectional view along line 3---3 of FIG. 1.'

Although the disclosure hereof is detailed and exact to enable those skilled in the art to practice the invention, the-physical embodiments herein disclosed merely exemplify the invention which may be embodied in other specific structure. The scope of the invention is defined in the claims appended hereto.

The sampling lance 10 has a hollow interior 12- and an open end 14 for receiving a sample cartridge 16. The lance 10 is desirablyconstructed of a material such as paperboard, refractory coated steel or molded sand coated with refractory cement which have sufficient immersion life to obtain a sample without loss of the end of the lance in the bath. v

The sample cartridge 16 of the invention includes opposed mold half sections 18 and 20 which define a mold cavity 22. The mold sections 18, 20 may be welded to a metal spacer 24, which separates the mold tory or fused quartz tube 30 which communicates with the source of molten metal and provides a passage into the mold cavity 22. The sample cartridge 16 can also be provided with a smooth walled pin sample mold 36 which has an end 38 which projects through an aperture 40 in the mold sections 18 and 20 for communication with the mold cavity 22. The tube 36 is provided with an air vent 42 to affordmetal flow from the cavity 22 into the tube. The pin molds 36 can be constructed of quartz or Vycor, a high temperature glass of Corning Glass Co.

The cartridge parts are held in assembly by an insulative disc 46 which is desirably constructed of refractory and has an aperture 48 for snugly receiving the mold I parts 26 and 28. The disc also has an aperture or notch 50 for positioning and securely holding the pin sample mold tube 36. Refractory cement at 52, 54, and 56 securely holds the cartridge parts to the disc 46. An insulative shield 60 which can be constructed of refractory and annular in shape with a diameter larger than the interior of the lance 10 has an aperture 62 for snugly receiving the tube 30. The refractory shield 60 is secured to the tube 30 with refractory cement at 63. The cartridge parts are also held together by an insulative sleeve 64 such as paperboard which is arranged around the tubular mold parts 26 and 28, and the tube 30 and located between the disc 46 and the shield 60. The paperboard tube 64 is cemented to the disc 46 and 54 and the refractory shield 60 at 65. The refractory shield 60, disc 46 and sleeve 64 insulate the sample cavity and pin mold tube from the bath and prevent entry of molten metal into the lance other than through the passage 31 which could interfere with disassembly of the cartridge 16 for removal of the sample. Refractory cement can also be employed at 69 to secure the tube 36 to the sleeve 64. An alternative construction can employ elongated mold projecting parts 26 and 28 which are received and cemented in the aperture 62 in the disc, with the tube 30 also projecting through the aperture 62.

When assembling the cartridge 16 in the lance 10, the cartridge 16 is inserted in the interior 12 of the lance and the refractory shield 60 seated onthe end 14 of the lance. The molds have sections snugly fit in the lance to firmly anchor the cartridge in the lance. Refractory cement 70 is then placed around the shield and the end 14 and a fusible cap 72 installed on the shield 60.

Alternatively, the cap 72 can be pre-assembled on the cartridge by securing the cap to the shield 60 with a refractory cement. The shield 60 can then be cemented to the lance 10 with refractory cement when the cartridge is assembled in the lance 10.

Various metal de'oxidants can be positioned in the tube 30 and/or in the cavity 22 to deoxidize the molten metal. An aluminum wire 74 is shown in FIG. 1.

Although the disclosed construction shows the use of a single disc' shaped sample mold, the use of multiple molds in a single sample cartridge, each with mold half sections 18and 20 is within the purview of the invention. I

The tip 8 0 of the tube 30 can be of a lesser diameter than the remaining part of the tube 30 to prevent loss of the sample;

. The sample cartridge of the invention affords quick assembly in the lance and easy removal of the cartridge from the lance by merely tapping the cartridge with a rod inserted in the interior 12 of the lance, and in the end of the lance opposite the cartridge.

The cartridge of the invention also provides two pin samples. The pin samples obtained in the tube 36 is deoxidized with the mold cavity 22 serving as mixing chamber for the deoxidant 74 and the molten metal which ultimately moves into the tube 36. The pin sample obtained in the passage 31 is not deoxidized because the flow of the metal through the passage 31 washes the deoxidant 74 'into the mold cavity 32.

What is claimed is:

1. A sample cartridge adapted to beinserted in an immersion lance comprising opposedmold sections defining a mold cavity, mold parts projecting from said mold sections, wall means defining a passage, said wall means being located within said mold parts and having a first end in communication with said mold cavity and a second end for receiving metal from a molten metal bath, an insulative shield spaced from said mold sections and having an aperture for receiving and supporting said wall means, an insulative sleeve arranged around said wall means and said projecting mold parts, and refractory cement securing said shield to said insulative sleeve, an aperture in said mold sections and a pin sample tube having an end projecting into said mold cavity through said aperture for receiving molten metal from said mold cavity, said tube extending exteriorly of said insulative sleeve toward said second end of said wall means and means for securing said pin sample tube to said insulative sleeve.

2. A sample cartride in accordance with claim 1 including an insulative disc having an aperture for receiving said projecting mold parts, said disc being spaced from said insulative shield and refractory cement securing said disc to said insulative sleeve.

3. A sample cartridge adapted to be inserted in a lance comprising opposed mold sections defining a mold cavity, mold parts projecting from said mold sections, wall means defining a passage, said wall means having a first end in communication with said mold cavity and a second end for receiving metal from amolten metal bath, an insulative shield spaced from said mold sections and having an aperture for supporting said wall means, an insulative sleeve arranged around said wall means and said projecting mold parts, and refractory cement securing said shield to said insulative sleeve, an aperture in said mold sections and a pin sample tube having an end projecting into said mold cavity through said aperture for receiving molten metal from said mold cavity, said tube extending exteriorly of said insulative sleeve and refractory cement securing said pin sample tube to said insulative sleeve and including a refractory disc having an aperture for receiving said projecting mold parts, said disc being spaced fromsaid shield and having an opening for receiving and supporting said pin sample tube and refractory cement securing said disc to said sleeve and securing said pin sample tube to said disc and to said sleeve.

4. A sample cartridge in accordance with claim 1 wherein said insulative sleeve comprises a paperboard tube.

5. A sample cartridge in accordance with claim 2 wherein said insulative disc and shield are constructed of refractory.

6. In combination, a sample cartridge and a sampling lance, said lance comprising an elongated body with an end and a hollow interior and said cartridge comprising a sample mold having opposed mold sections defining a mold cavity, said mold sections being snugly received in said lance interior to retain said sample cartridge in said lance, said mold sections including projecting portions, wall means defining a passage for conveying molten metal into said cavity, said wall means extending into said projecting portions and having an outer end, a refractory shield having an aperture supporting said outer end of said wall means, said refractory shield being larger than the interior of said lance and the end of said lance providing a seat for said shield, a paperboard sleeve arranged around said wall means defining a passage and having an end fixed to said refractory shield, a cap having and interior complementary in shape with said shield and in a press fit around said shield, and refractory cement securing said cap and said shield to said end of said lance.

7. A sample cartridge adapted to be inserted in an immersion lance comprising first wall means defining a mold cavity, second wall means defining a passage and having a first end in communication with said mold cavity and a second end for receiving metal from a molten metal bath, an insulative shield having anaperture receiving said second wall means an aperture in said wall means defining said cavity and a pin sample tube having a first end projecting into said mold cavity through said aperture for receiving molten metal from said mold cavity, and a second end remote from said mold cavity and open to provide an air vent, said tube extending exteriorly of said passage toward said insulative shield and said second end of said second wall means said shield being located between said second end of said pin sample tube and said second end of said wall means and means for securing said pin sample tube to said second wall means.

UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No. 3!791219 Dated FebTuaTY 9 Richard A. Falk Inventor s) It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

Claim 7, line 17, after "Wall means" insert said shield being located between said second end of said pin sample tube and said second end of said wall means gigd Scale [SEAL] Attest:

thirtieth Day of December 1975 

1. A sample cartridge adapted to be inserted in an immersion lance comprising opposed mold sections defining a mold cavity, mold parts projecting from said mold sections, wall means defining a passage, said wall means being located within said mold parts and having a first end in communication with said molD cavity and a second end for receiving metal from a molten metal bath, an insulative shield spaced from said mold sections and having an aperture for receiving and supporting said wall means, an insulative sleeve arranged around said wall means and said projecting mold parts, and refractory cement securing said shield to said insulative sleeve, an aperture in said mold sections and a pin sample tube having an end projecting into said mold cavity through said aperture for receiving molten metal from said mold cavity, said tube extending exteriorly of said insulative sleeve toward said second end of said wall means and means for securing said pin sample tube to said insulative sleeve.
 2. A sample cartride in accordance with claim 1 including an insulative disc having an aperture for receiving said projecting mold parts, said disc being spaced from said insulative shield and refractory cement securing said disc to said insulative sleeve.
 3. A sample cartridge adapted to be inserted in a lance comprising opposed mold sections defining a mold cavity, mold parts projecting from said mold sections, wall means defining a passage, said wall means having a first end in communication with said mold cavity and a second end for receiving metal from a molten metal bath, an insulative shield spaced from said mold sections and having an aperture for supporting said wall means, an insulative sleeve arranged around said wall means and said projecting mold parts, and refractory cement securing said shield to said insulative sleeve, an aperture in said mold sections and a pin sample tube having an end projecting into said mold cavity through said aperture for receiving molten metal from said mold cavity, said tube extending exteriorly of said insulative sleeve and refractory cement securing said pin sample tube to said insulative sleeve and including a refractory disc having an aperture for receiving said projecting mold parts, said disc being spaced from said shield and having an opening for receiving and supporting said pin sample tube and refractory cement securing said disc to said sleeve and securing said pin sample tube to said disc and to said sleeve.
 4. A sample cartridge in accordance with claim 1 wherein said insulative sleeve comprises a paperboard tube.
 5. A sample cartridge in accordance with claim 2 wherein said insulative disc and shield are constructed of refractory.
 6. In combination, a sample cartridge and a sampling lance, said lance comprising an elongated body with an end and a hollow interior and said cartridge comprising a sample mold having opposed mold sections defining a mold cavity, said mold sections being snugly received in said lance interior to retain said sample cartridge in said lance, said mold sections including projecting portions, wall means defining a passage for conveying molten metal into said cavity, said wall means extending into said projecting portions and having an outer end, a refractory shield having an aperture supporting said outer end of said wall means, said refractory shield being larger than the interior of said lance and the end of said lance providing a seat for said shield, a paperboard sleeve arranged around said wall means defining a passage and having an end fixed to said refractory shield, a cap having and interior complementary in shape with said shield and in a press fit around said shield, and refractory cement securing said cap and said shield to said end of said lance.
 7. A sample cartridge adapted to be inserted in an immersion lance comprising first wall means defining a mold cavity, second wall means defining a passage and having a first end in communication with said mold cavity and a second end for receiving metal from a molten metal bath, an insulative shield having an aperture receiving said second wall means an aperture in said wall means defining said cavity and a pin sample tube having a first end projecting into said mold cavity through said aperture for receiving molten metal from said mold cavity, and a second end remote from said mold cavity and open to provide an air vent, said tube extending exteriorly of said passage toward said insulative shield and said second end of said second wall means said shield being located between said second end of said pin sample tube and said second end of said wall means and means for securing said pin sample tube to said second wall means. 